<template>
  <div>
    <span v-for="(item,index) in arr" :key="index">
      <input type="checkbox" v-model="newarr" :value="item">{{ item }}
    </span>
    <br>
    <span>你选中的元素,累加的值为：{{ getSum }}</span>
  </div>
</template>

<script>
export default {
  data(){
    return {
      arr:[9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
      newarr:[]
    }
  },
  computed:{
    getSum(){
      return this.newarr.reduce(( sum , newarr) => {
        return sum +=newarr
      },0)
    }
  }
}
</script>

<style>

</style>